docs: def _initialize_generator(self,gen,obj=None):
          """
          Add 'last time' and 'last value' attributes to the generator.
          """
          # CEBALERT: use a dictionary to hold these things.
          if hasattr(obj,"_Dynamic_time_fn"):
              gen._Dynamic_time_fn = obj._Dynamic_time_fn
  
          gen._Dynamic_last = None
          # CEB: I'd use None for this, except can't compare a fixedpoint
          # number with None (e.g. 1>None but FixedPoint(1)>None can't be done)
          gen._Dynamic_time = -1
  
          gen._saved_Dynamic_last = []
          gen._saved_Dynamic_time = []